[PATCH for-rc 4/5] RDMA/irdma: Use s/g array in post send only when its valid

From: Shiraz Saleem <shiraz.saleem@intel.com>
To: jgg@nvidia.com, leon@kernel.org
Cc: linux-rdma@vger.kernel.org,
	Sindhu-Devale <sindhu.devale@intel.com>,
	Shiraz Saleem <shiraz.saleem@intel.com>
Subject: [PATCH for-rc 4/5] RDMA/irdma: Use s/g array in post send only when its valid
Date: Tue,  6 Sep 2022 17:32:43 -0500	[thread overview]
Message-ID: <20220906223244.1119-5-shiraz.saleem@intel.com> (raw)
In-Reply-To: <20220906223244.1119-1-shiraz.saleem@intel.com>

From: Sindhu-Devale <sindhu.devale@intel.com>

Send with invalidate verb call can pass in an
uninitialized s/g array with 0 sge's which is
filled into irdma WQE and causes a HW asynchronous
event.

Fix this by using the s/g array in irdma post send
only when its valid.

Fixes: 551c46e ("RDMA/irdma: Add user/kernel shared libraries")
Signed-off-by: Sindhu-Devale <sindhu.devale@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
---
 drivers/infiniband/hw/irdma/uk.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/irdma/uk.c b/drivers/infiniband/hw/irdma/uk.c
index d003ad8..a6e5d35 100644
--- a/drivers/infiniband/hw/irdma/uk.c
+++ b/drivers/infiniband/hw/irdma/uk.c
@@ -497,7 +497,8 @@ int irdma_uk_send(struct irdma_qp_uk *qp, struct irdma_post_sq_info *info,
 			      FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data));
 		i = 0;
 	} else {
-		qp->wqe_ops.iw_set_fragment(wqe, 0, op_info->sg_list,
+		qp->wqe_ops.iw_set_fragment(wqe, 0,
+					    frag_cnt ? op_info->sg_list : NULL,
 					    qp->swqe_polarity);
 		i = 1;
 	}
-- 
1.8.3.1

